Returns the color specification parsed from the color string
or parsed from the corresponding string found in a color-name database.

Specifies
the pixel member that indicates the color cell to query. The color specification
stored for the color cell is returned in this XcmsColor structure.

Returns
the color that can be reproduced on the screen.

Specifies the color stringSt.

Specifies the color format for the returned color specifications (color_screen_return
and color_exact_return arguments). If the format is XcmsUndefinedFormat
and the color string contains a numerical color specification, the specification
is returned in the format used in that numerical color specification. If
the format is XcmsUndefinedFormat and the color string contains a color
name, the specification is returned in the format used to store the color
in the database.

Specifies the number of XcmsColor structures in the
color-specification array.

The XcmsQueryColor function obtains
the RGB value for the pixel value in the pixel member of the specified
XcmsColor structure and then converts the value to the target format
as specified by the result_format argument. If the pixel is not a valid
index in the specified colormap, a BadValue error results. The XcmsQueryColors
function obtains the RGB values for pixel values in the pixel members
of XcmsColor structures and then converts the values to the target format
as specified by the result_format argument. If a pixel is not a valid index
into the specified colormap, a BadValue error results. If more than one
pixel is in error, the one that gets reported is arbitrary.

XcmsQueryColor
and XcmsQueryColors can generate BadColor and BadValue errors.

The
XcmsLookupColor function looks up the string name of a color with respect
to the screen associated with the specified colormap. It returns both the
exact color values and the closest values provided by the screen with
respect to the visual type of the specified colormap. The values are returned
in the format specified by result_format. If the color name is not in the
Host Portable Character Encoding, the result is implementation-dependent.
Use of uppercase or lowercase does not matter. XcmsLookupColor returns
XcmsSuccess or XcmsSuccessWithCompression if the name is resolved;
otherwise, it returns XcmsFailure. If XcmsSuccessWithCompression is
returned, the color specification returned in color_screen_return is the
result of gamut compression.

Some numeric value
falls outside the range of values accepted by the request. Unless a specific
range is specified for an argument, the full range defined by the argument's
type is accepted. Any argument defined as a set of alternatives can generate
this error.